Never heard of that for blueberries. We grew those for years.

Minteeleaf

I've been reading about them preparing for my first ever blueberries.

Opps, I meant shoots not roots

"Flower Removal - Remove all the flowers during the first year. Do not permit
berries to develop, as they will restrict shoot growth."

http://www.noursefarms.com/planting_...ies_guide.html